GB1495703A - Nitriding of ferrous metals - Google Patents

Nitriding of ferrous metals

Info

Publication number
GB1495703A
GB1495703A GB5751673A GB5751673A GB1495703A GB 1495703 A GB1495703 A GB 1495703A GB 5751673 A GB5751673 A GB 5751673A GB 5751673 A GB5751673 A GB 5751673A GB 1495703 A GB1495703 A GB 1495703A
Authority
GB
United Kingdom
Prior art keywords
nitriding
ferrous metals
hydrogen
hours
nitride layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5751673A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GKN Group Services Ltd
Original Assignee
GKN Group Services Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GKN Group Services Ltd filed Critical GKN Group Services Ltd
Priority to GB5751673A priority Critical patent/GB1495703A/en
Publication of GB1495703A publication Critical patent/GB1495703A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/24—Nitriding
    • C23C8/26—Nitriding of ferrous surfaces

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

1495703 Nitriding ferrous metals GKN GROUP SERVICES Ltd 27 Feb 1975 [12 Dec 1973] 57516/73 Headings C7D and C7U Ferrous metal is nitrided in dissociated ammonia, whereby a nitride layer is formed, and is then heated in a reducing atmosphere for not more than 6 hours to remove at least 90% of the nitride layer without causing excessive softening of the treated surface. The preferred reducing atmosphere is hydrogen or a mixture of hydrogen with nitrogen or inert gas. Nitriding may be carried out at 480-560‹C for 16-72 hours.
GB5751673A 1973-12-12 1973-12-12 Nitriding of ferrous metals Expired GB1495703A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5751673A GB1495703A (en) 1973-12-12 1973-12-12 Nitriding of ferrous metals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5751673A GB1495703A (en) 1973-12-12 1973-12-12 Nitriding of ferrous metals

Publications (1)

Publication Number Publication Date
GB1495703A true GB1495703A (en) 1977-12-21

Family

ID=10479376

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5751673A Expired GB1495703A (en) 1973-12-12 1973-12-12 Nitriding of ferrous metals

Country Status (1)

Country Link
GB (1) GB1495703A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2507212A1 (en) * 1981-06-08 1982-12-10 Usui Kokusai Sangyo Kk STEEL TUBE HAVING A LAYER CURED ON AT LEAST ONE OF ITS SURFACES
EP0545069A1 (en) * 1991-12-04 1993-06-09 Leybold Durferrit GmbH Method of treating steel and refractory metals

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2507212A1 (en) * 1981-06-08 1982-12-10 Usui Kokusai Sangyo Kk STEEL TUBE HAVING A LAYER CURED ON AT LEAST ONE OF ITS SURFACES
EP0545069A1 (en) * 1991-12-04 1993-06-09 Leybold Durferrit GmbH Method of treating steel and refractory metals

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee